课前活动是课堂教学部分不可或缺的重要前奏。
The before-class activities are the most important part of the English class.
课程和教学部分的知识点一直都是教育学原理中的重中之重。
The intellectual dot of course and education part is pedagogic principle all the time medium Chongzhongzhi is heavy.
由于时间和能力有限，研究的对象主要是中学阶段尤其是高中的历史教学部分。
Because of the limit of time and ability, the objective of research is only referring to the stage of middle school, especially the history-education of high school.
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